Its appearance is similar to brush, calligraphy has zhuanli kaicao line, brush is a unique cultural invention of Chinese. Chinese literati use it to wave strange thoughts and release feelings. In the long history of the river, the pen is hoed, paper as the field, and the "spring and Autumn period under pen" left for us is the spiritual symbol of Chinese people. A divine pen stands in front of you. You can imagine how it is a painting, writing beautiful scenery in the cave, so beautiful and elegant.